Valve system



May 30, 1933. w. UEBERMUTH VALVE SYS TEM Filed May 10, 1930 uth, MW

Inventor: War-n e1 LJeb errn by Fig.2.

His Attorneg.

Patented May 30, 1933 1312,1124

UNITED STATES PATENT OFFICE WERNER 'UEBERMUTH, OF BERLIN-OBEESCHONEWEIDE, GERMANY, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK VALVE SYSTEM Application filed May 10, 1930, Serial No. 451,383, and in Germany May 18, 1929.

My invention relates to valve systems, and compressed gas for an arc extinguisher of a more particularly to valve systems for the gas-blast switch, rapid control of pipe lines containing gas Fig. 2 is an elevation, partly in section, under pressure. showing the main and control valveson a It is an object of my invention to provide larger scale, and p a system of this type which is operated rap- Fig. 3 is a detail showing a relay in comidly and by a very small force and neverthebination with the control valve. less exposes a large area. Referring to the drawing and first to Fig. To this end I design the valve as a stepped 1, 1 is a reservoir containing gas under pres- 10 piston and provide for the regulation of the sure for supplying a gas blast to the are expressure on one side of the main valve a contlnguisher, 2 is the casing of the main valve, trol valve which is a duplicate of the main 3 is a pipe extending from the reservoir to v l on a r du d al the casing 2, 4 is a pipe extending from the In a stepped piston valve of the kind decasing to the extinguisher or exhaust pipe 5 15 scribed the valve is held on its seat by a force through which the aforesaid gas blast is diwhich is proportional to the differential area rected, 6 is the casing of the control valve, 7 of its two faces, when equal pressure acts on isa lever for operating the control valve, and both faces. When the pressure acting on the 8 is a link connecting lever 7 withan electric larger face is relieved or reduced, preferably mechanism, not shown.

20 by connecting it with atmosphere, the piston Referring now to Fig. 2, 9 is a piston valve alve is unseated the excess of pressure Wlhll a large piston 10 1S fitted to slide acting on its smaller face. in a cylinder of the casing 2, and a small If the pressure acting on the piston valve p ston 11 Whi h controls a seat intermediate is high and the force available for venting h P 13881 3 and 4. 12 is a spring in the large 25 the space connected with its larger face is P 0 Which tends to seat the valve, and

ll, th t l valve t b ll i 13 is a small bore or passage which connects proportion so that it is unable to rapidly rehep peifi Wi lrthe Cylinder of the piston 10.

have the pressure on the larger fags In 14 1S 8. plpt, WlllCll COIlIlGCtS the cylinder With order to control the valve at a faster rate I the CflSlIlg 6 f t e cOntrol valve. 15 is the provide the control valve referred to, which f which is Seated above an p is a reduced duplicate of, and is similar in g the plpe 4 With its Smaller piston operation to the main valve. The control Whlle larger piston 17, similarly to the valve, which may be operated directly or inlarger plston 10 of the Valve is fitted to directly by any suitable mechanism, controls slid? the Casing and is q ipped With a spring 18 for seatlng the valve.

an opening which is so large as to permit 7 rapid venting of the space connected with the hen the control Valve 15 hfted from its seat, the pressi'ire 1n the cylinder of the larger face of the main valve. As the control valve is so much smaller than the main P 1 abruptly valve, it is operated rapidly by a small force Y l Wi the w i and a correspondingly rapid reduction of the T l, gefxclemq p} essure mm e plpe Tina on the 1 er face of themain 5 1o\ es e 1e smal er piston 11 from its seat i l 1 M g intermediate the pipes 3 and 1. WVh-en the i 5: 2:3 faxed to thiq specifimtion contflol valve 15 is se-alted preslsure bcpilds up 1 2: in t e casin 2 ns *ein ac mitte to the 45 and forming a part thereof a valve embodyylinder thrhugh the boFe 13 so that th '95 ing my invention is illustrated diagrammatipiston 1 assisted bv the 1 is moved al y y w y of mp to the right and the connection between the In the drawing pipes 3 and 4 is interrupted by the piston 11 Fig. 1 is a diagram showing the position of b o ing s ated. 50 the control valve at a reservoir containing The control valve 15 being a reduced dushould connect the cl casing 29 which plicate of the main valve 9 is operated practically without inertia forces.

The operating lever is seated on a cam shaft 19 with a cam 20, which shaft is fitted to rotate and to slice in the casing (3 and is connected with a piston 21 and a spring .22. The cam 20 c n perates with the spindle 23 of an auxiliary valve Ql which is held on a seat in the casing 6 above the piston 17 of the control valve 15 by a spring 26. 25 is a bore in the casing 6 which connects it with the ati'nosphere, so that when the cam shaft 19 rotated to open th valve 23% the space above the piston 1'? is connected with the atmosphere through the bore 25, the pressure above the piston 17 is reduced and the valve 15 lays open the opening 16.

It is not desire. le that the main valve 9 pipes 3 and at longer than iiat it should be closed as soon as the desired effect, extinguishing the arc has been achieved. Since arcing may be quickly extir" ished at the proper pr ssure, a brief a: vis is iS required but 1 k i blastsuflicient. T ellected through the medium of a pipe 27 which connects the space in the casing 6 at the rear of the piston 2i. with the pipe at, so that when gas flows in the pipe 4 the cam shaft 19 is moved to the right and moves the cam 20 out of engagement with the spindle 23. The spring 26 now closes the auxiliary valve 94: whereupon the control valve 15 is seated and causes the main valve 9 to be seated in the manner described.

lileans are preferably provided for preventing operation of the main valve, when the pressure in the reservoir is too low. To this end a valve 28 is arranged in a suitable may be connected with, or arranged on, the reservoir 1. In Fig. 1, a pipe 30 is shown by which the casing 29 is connected with the reservoir 1. 31 is a g which tends to open the valve 28, and is a pipe line which connects the casing 29 with that part of the casing 6 in which the piston 21 is fitted to slide. hen the pressure in the reservoir 1 falls below the limit for which the spring has been adjusted, the

UL valve 28 is opened by the spring and admits gas from the reservoir 1 to the chamber of the piston 21, forcing it to the right and moving the cam 20 out of coi'inection with the stem of the auxiliary valve 24;. so that when the link 8 is operated by the electrical mechanism referred to the valve 24 will not open.

Pneumatic or electrical signalling means (not shown) may be provided so to be operated by the pressure in the pipe 32 and to indicate that the pressure in the reservoir 1 has become too low.

lVhcn the pressure in the reservoir has attained its normal amount, the valve 28 closes and the gas from the pipe 32 escapes through a small bore the piston 21.

It electrical energy is employed for operating the valve system, the force may be so small that the auxiliary valve 24 cannot be actuated. In such cases the relay mechanism illustrated in F 3 is combined with the valve 2st. 3st is a cylinder which is secur d to the casing 6 above the chamber of the valve 2t, 35 is a piston which is fitted to slide in the cylinder 34 against a spring 36, and 37 is a piston rod which projects from the cover of the cylinder. The lever 7 is arranged in suitable hearings on the cover of the cylinder and. is connected with a pawl 38 which is adapted to engage below the shoulder 39 on the piston rod. Spring means, not shown, or any other suitable means, may be provided which tend to hold the pawl 38 engaged. with the shoulder 39. The pipes 27 and 32 are connected with the space below the piston 35. lVhen'the valve 9 has been operated the pressure from the pipe 27 raises he piston and causes the pawl 38 to engage below its shoulder 39. V hen the lever '7 is operated by the link 8, the pawl 38 is withdrawn, the piston 35 descends under e action oi spring 36, and the lower l of the piston rod 37 strikes the stem 23 (i the auxiliary valve 24. The air from the 33 in the cylinder of Z chamber above the valve is discharged tl'irough a. bore 40, and the valve 15 1s operated as d-cf-icribed. When the valve has been operated the pressure in the pipe 27 returns tie piston to its initial position in which the rod 37 is arrested by the pawl 38, and tire, relay mechanism now ready for the next operation. lVhcn the pressure in the reservoir 1 falls below the limit aforesaid, the valve 28 is opened and admits gas to the chamber below the piston 35 through the pipe 32. The piston is now raised and operation of the valve 2% is prevented as the piston cannot descend notwithstanding the release of its rod by the pawl 38.

I wish it to be understood that I do not dost-ire to be limited to the exact details of construction shown and described for obvious modifications will occur to a person skilled in the art.

In the claims atlixed to this specification no selection of any particular modification ot the invention is intended to the exclusion of other modifications thereof and the right to subsequently malre claim to any modification not covered by these claims is expressly reserved.

I claim:

1. A valve system comprising a main valve including two pistons of different diameters, a cylinder in which one of said pistons is fitted to slide, a casing connected with said cylinder, a control valve which is substantially a duplicate of the said main valve on a reduced scale and is fitted to slide in said casing and adapted to relieve the pressure on the larger piston of said main valve, means including an auxiliary valve for relieving the pressure on the larger piston of said control valve, and means influenced by the pressure controlled by said main valve for rendering inactive said pressure-relieving means.

2. A valve system comprising a reservoir for fluid under pressure, a main valve connected with said reservoir and including two pistons of different diameters, a cylinder in which one of said pistons is fitted to slide, a casing connected with said cylinder, a control valve which is substantially a duplicate of the said main valve on a reduced scale and is fitted to slide in said casing and adapted to relieve the pressure on the larger piston of said main valve, means including an auxiliary valve for relieving the pressure on the larger piston of said control valve, and means influenced by the pressure in said reservoir for rendering inactive said pressure-relieving means.

3. A valve system comprising a main valve including two pistons of different diameters, a cylinder in which one of said pistons is fitted to slide, a casing connected with said cylinder, a control valve which is substantially a duplicate of the said main valve on a reduced scale and is fitted to slide in said casing and adapted to relieve the pressure on the larger piston of said main valve, an auxiliary valve for relieving the pressure on the larger piston of said control valve, a springcontrolled member for opening said auxiliary valve and means for locking said member against operation by said spring.

4. A valve system comprising a main valve including two pistons of different diameters,

' a cylinder in which one of said pistons is fitted to slide, a casing connected with said cylinder, a control valve which is substantially a duplicate of the said main valve on a reduced scale and is fitted to slide in said casing and adapted to relieve the pressure on the larger piston of said main valve, an auxiliary valve for relieving the pressure on the larger piston of said control valve, a springcontrolled piston for opening said auxiliary valve, means for locking said piston against operation by its spring, and means influenced by the pressure controlled by said main valve for moving said spring-controlled piston into a position in which it is held by said locking means.

5. A valve system comprising a reservoir for fluid under pressure, a main valve connected with said reservoir and including two pistons of different diameters, a cylinder in which one of said pistons is fitted to slide, a casing connected with said cylinders, a control valve which is substantially a duplicate of the said main Valve on a reduced scale and is fitted to slide in said casing and adapted to relieve the pressure on the larger piston of said main valve, an auxiliary valve for relieving the pressure on the larger piston of said control valve, a spring-controlled piston for opening said auxiliary valve, means for locking said piston against operation by said spring, and means influenced by the pressure in said reservoir for moving said spring-controlled piston into a position in which it is held by said locking means.

6. A valve system comprising a reservoir for fluid under pressure, a main valve connected with said reservoir and including two pistons of different diameters, a cylinder in which one of said istons is fitted to slide, a

casing connected with said cylinder, a control including two pistons of different diameters, a cylinder in which one of said pistons is fit-' ted to slide, a casing connected with said cyl inder, a control valve which is substantially a duplicate of the said main valve on a reduced scale and is fitted to slide in said casing and adapted to relieve the presure on the larger piston of said main valve, an auxiliary valve forrelieving the pressure on the larger piston of said control valve, a cam shaft for operating said auxiliary valve, and means in fluenced by the pressure controlled by said main valve for moving said cam shaft into inactive position with respect to said auxiliary valve.

8. A valve system comprising a reservoir for fluid under pressure, a main valve connected with said reservoir and including two pistons of different diameters, a cylinder in which one of said pistons is fitted to slide, a casing connected with said cylinder, a control valve which is substantially a duplicate of the said main valve on a reduced scale and is fitted to slide in said casing and adapted to relieve the pressure on the larger piston of said main valve, an auxiliary valve for relieving the pressure on the larger piston of said control valve, a cam shaft for operating said auxiliary valve, and means influenced by the pressure in said reservoir for moving said cam shaft into inactive position with respect to said auxiliary valve.

9. A valve system for controlling a brief gas blast comprising a reservoir for fluid under pressure, a main valve controlling communication between said reservoir and an exhaust passage for said blast, the pressure at opposite sides of a piston controlling said main valve being substantially equalized in the closed position thereof, a control valve for relieving pressure on one side of said main valve piston causing opening thereof, and means responsive to the blast pressure within said exhaust passage for causing closing of said control valve and subsequent re-closing of said main valve.

10. A valve system for controlling a gas blast comprising a reservoir for fluid under pressure, a main valve cont-rolling communication between said reservoir and an exhaust passage, the pressure at opposite sides of a piston controlling said main valve being sub stantially equalized in the closed position thereof, a control valve for relieving pressure 011 one side of said main valve piston causing opening thereof, means controlling the operation of said control valve, and means forming a fluid passage between said exhaust passage and said controlling means, the pressure transmitted through said fluid passage during the gas blast causing closing of said control valve and subsequent closing of said main valve.

11. A valve system for controlling a brief gas blast comprising a reservoir for fluid under pressure, a main valve controlling communication between said reservoir and an exhaust passage, means for substantially equalizing the pressure on opposite sides of a piston controlling said main valve in the closed position, a control valve for relieving pressure on one side of said main valve piston causing opening thereof, the aforesaid pressure being likewise equalized at opposite sides of a piston controlling said control valve, an auxiliary valve for relieving pressure on one side of said control valve piston. and means responsive to the blast pressure within the aforesaid exhaust passage for causing closing of said auxiliary valve and subsequent closing of said control and main valves.

In testimony whereof I affix my signature.

lVER-NER UEBERMUTH. 

